<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    <!--函数定义方式一-->
    function addNumbers(a,b){
        return a+b;
    }
    let c = addNumbers(10,13);
    alert(c);

    // 函数定义方式二
    let multiplyNumbers = function(a,b){
        return a*b;
    }

    let d = multiplyNumbers(10,80);
    alert(d)

</script>

</body>
</html>